Safety-envelop blank



M. L. HINCHMAN.

SAFETY ENVELOP BLANK.

APPLICATION FILED SEPT. 16, 1919.

Patented Sept.

INVENTOR, BY )[Lflinc/cmaw WITNESS:

A T TORNE Y.

UNITED STATES- PATENT OFFICE.

MORTIMER L. HINGHMAN, 30F BROOKLYN, NEW YORK.

SAFETY-ENVELOP BLANK.

' Specification of Letters Patent.

Application filed September 16, 1919. Serial No. 324,064.

envelop, the said blank to comprise front and back folds, a sealing flap on the front fold, side flaps on the back fold and-the blank embodies perforating and v pasting schemes for the quick and easy formation of the envelop and its subsequent opening,

for access to its contents; to provide the blank with partly severed portions which when the envelop is made up and sealed are severable with a quite natural pull with the fingers to open the formed envelop; to provide a blank so made up that the parts thereof may be pasted together to inclose a letter in a manner which guards against surreptitious removal of the letter from the formed envelop, the parts of the envelop being unavoidably mutilated.

In the drawing accompanying this specification:

Figure 1, is a plan view of a single piece of material cut out, perforated and gummed in accordance with this invention to produce a blank from which an envelop is made up,

Fig. 2 is a plan view showing the opposite side of the blank shown in Fig. 1.

Fig. 3, is a view illustrating the blank partly folded in the making of an envelop.

Referring now to the drawing, it will be noted that the blank from which an envelop may be made up, is in fact, a single piece of material, and that in its cut out condi- 7 tion it comprises a front fold 10, a back fold 11, a seal flap 12 on the front fold 10, and side flaps 13 on the back fold 11.

In carrying out this invention there is embodied perforating and pasting schemes. The reasons for these schemes have been stated hereinbefore.

The perforating scheme provides the completed envelop with partly severed portions which are severable from the other portions of the envelop in the envelop opening operation. The seal flap 12 is perforated or indented as at let and the front fold 10 is perforated as at 15, to provide a partly severed portion 16 forming a part of both the sealing flap and the front fold. The back fold 11 is perforated as at 17 to provide a partly severed portion 18. Each of the side flaps 13 is perforated as at 19 to provide partly severed portions 20. The result accomplished by so providing the I various folds and flaps with partly severed portions will be hereinafter more fully ex plained.

The pasting scheme allows the envelop to be quickly formed from the blank and helps with the perforating scheme to prevent the practice of fraud. To these ends the scheme consists of providing the side flaps with adhesived or gummed portions 21 so that the flaps 13 may be pasted together.

The flaps 13 are also provided with gummed portions 22 and 23 so that the side flaps may be pasted to the front fold 10, to complete the envelop formation. It is to be understood that I do not limit myself to the putting of the gummed portions on the side flaps as such portions may give the same result when they exist on the front fold. The seal flap 12 has a marginal gummed portion 24: so that a letter or other communication may be sealed up within pocket formed by the remaining parts of the blank when the end of said flap is pasted to the back fold 11. The portions of the side flaps 13 within the confines of the perforations 19 are gummed as at 25 for a purpose to appear.

To form the envelop, the blank is folded on the lines 26 to bring the side flaps 13 in over the back fold 11. vThe blank is next folded on the line 27 so as to bring the side flaps into contact with the front fold after the gummed portions 21 have been moistened for the pasting of said side flaps to the front fold, thus providing the usual pocket.

The envelop having been formed, may in such condition receive a letter or the like, after which incident, the gummed portions 20 and the gummed portion 24 onthe seal flap 12 are moistened. The seal flap 12 is then brought over on its fold line 28 and slight pressure or wiping action causes the partly severed portions 20 and the partly severed portion 18 to stick together at a point over the inclosed letter, and at the Patented Sept. *7, 1920.

same time causing the seal flap 12 to adhere to the back fold 11 as will be understood.

reptitious opening of the, envelop atthe respectively.

sides thereof, between the-side flaps 13and the front fold 10,. the front fold and the side flaps are perforated as at 15 and 13 Any attempt by an unauthorized person to wrongfully open the envelop by steaming ,or by the use of pointed instruments, Will be revealed.

What I claim as new is: I

1. Arsblank from which an envelop is formed, including front and back foldst a seal flap forming part of said front fold having a marginal gumm'ed portion, a partly severed portion embodied/by the front fold and seal flap, side flaps forming a part of said backfold, gummed areas on th'eside flaps, partly severed gumrned .por

tions in the side flaps, and a partly severed portion in the back fold to which the partly severed gummed portions in the side flaps are pasted. a

j 2. An envelop comprising a front fold and asea'lflap formed therewith; a back fold and side flaps formed therewith, the said side' fiaps being attached to the; front fold, perforations providing a partly severedportion in the front fold and the seal flap, perforations providing partly severed portions in said back fold and side flaps which register,. perforations at the side edges of the front fold, all of said perfo rationsadaptedto be moistened for the opening operation.

3. A blank fromv hich an envelop is to be formed comprising a'front fold and a seal flap formed therewith having a marginal gummedlportion; a back fold'a-nd side flaps formed therewith, said side flaps having ,gummed areas; perforations providing a partly severed portion in the front fold andthe seal,fiapyperforations providing partly severed portions in the said back foldand side flaps which register, perforations at the side edges of the front fold,.'ro\vs of perforationsin the side flap;

Intestimony whereof I hereby affix my signature, 7

i OR IM 'nINonMAN. 

